KR970044424A - How to troubleshoot oxygen (O_2) sensor in the vehicle exhaust - Google Patents

How to troubleshoot oxygen (O_2) sensor in the vehicle exhaust Download PDF

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Publication number
KR970044424A
KR970044424A KR1019950050774A KR19950050774A KR970044424A KR 970044424 A KR970044424 A KR 970044424A KR 1019950050774 A KR1019950050774 A KR 1019950050774A KR 19950050774 A KR19950050774 A KR 19950050774A KR 970044424 A KR970044424 A KR 970044424A
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South Korea
Prior art keywords
sensor
correction value
period
academic
limit
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Application number
KR1019950050774A
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Korean (ko)
Inventor
어정수
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전성원
현대자동차 주식회사
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Priority to KR1019950050774A priority Critical patent/KR970044424A/en
Publication of KR970044424A publication Critical patent/KR970044424A/en

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  • Measuring Oxygen Concentration In Cells (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Combined Controls Of Internal Combustion Engines (AREA)

Abstract

본 발명의 O2-센서가 초기상태일 때 공연비 학술 보정값과 제어주기를 참고하여 변화되는 량이 일정 한계값을 동시에 초과할 때 고장판단을 내리므로써, 정확히 O2-센서의 고장을 진단할 수 있어 자동차 배기가스 규제 법규를 만족할 수 있다.When the O 2 sensor of the present invention is in the initial state, the failure determination is made when the amount of change by referring to the air-fuel ratio academic correction value and the control period simultaneously exceeds a predetermined limit value, thereby accurately diagnosing the failure of the O 2 sensor. Therefore, it can meet the regulations of automobile exhaust gas regulation.

Description

자동차의 배기수단에서 산소(O2)-센서 고장진단 방법Oxygen (O2) sensor failure diagnosis method in vehicle exhaust means

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명에 의한 자동차의 배기수단에서 O2-센서의 고장진단을 위한 플로우챠트.1 is a flowchart for diagnosing a failure of an O 2 sensor in an exhaust means of an automobile according to the present invention.

Claims (1)

자동차의 배기수단에서 산소(O2)-센서 고장진단 방법에 있어서, O2-센서의 고장진단 작동시작 신호로부터 O2-센서 출력 전압을 측정하는 제 1단계;상기 제1단계로부터 공연비 제어 로직에 의해 공연비 학술 보정값을 측정하는 제2단계; 상기 제1단계로부터 사이클 듀레이션을 측정하는 제3단계; 상기 제2단계로 부터 "공연비 학술 보정값〉한계값"인가를 판단하는 제4단계; 상기 제3단계로부터:사이클 듀레이션 주기〉한계주기"인가를 판단하느 제5단계; 상기 제4단계로부터 "공연비 학술 보정값〉한계값"이 아닐 경우 상기 제1단계로 복귀하는 제6단계; 상기 제5단계로부터"사이클 듀레이션 주기〉한계주기"가 아닐 경우상기 제1단계로 복귀하는 제7단계; 및 상기 제4단계로부터 "공연비 학술 보정값〉한계값"이고, 상기 제5단계로부터"사이클 듀레이션 주기〉한계주기"인 경우 O2-센서가 고장임을 판단하는 제8단계로 이루어지는 것을 특징으로 하는 O2-센서고장진단 방법.Oxygen in the exhaust means of a car (O 2) - sensor failure according to the diagnostic methods, O 2 - O 2 from the failure diagnosis operation start signal of the sensor - a first step of measuring the sensor output voltage; air-fuel ratio from the first step the control logic A second step of measuring an air-fuel ratio academic correction value by; A third step of measuring a cycle duration from the first step; A fourth step of judging whether the performance ratio is a scientific correction value > limit value " from the second step; A fifth step of determining whether the cycle duration period> limit period ”is from the third step; if the difference is not the“ performance ratio academic correction value> limit value ”from the fourth step, returning to the first step; A seventh step of returning to the first step if it is not the "cycle duration period> limit period" from the fifth step; and the "performance ratio academic correction value> limit value" from the fourth step, and the cycle from the fifth step. Duration period> limit period ”, the O 2 -sensor failure diagnosis method comprising the eighth step of determining that the O 2 -sensor failure.
KR1019950050774A 1995-12-15 1995-12-15 How to troubleshoot oxygen (O_2) sensor in the vehicle exhaust KR970044424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950050774A KR970044424A (en) 1995-12-15 1995-12-15 How to troubleshoot oxygen (O_2) sensor in the vehicle exhaust

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950050774A KR970044424A (en) 1995-12-15 1995-12-15 How to troubleshoot oxygen (O_2) sensor in the vehicle exhaust

Publications (1)

Publication Number Publication Date
KR970044424A true KR970044424A (en) 1997-07-26

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KR1019950050774A KR970044424A (en) 1995-12-15 1995-12-15 How to troubleshoot oxygen (O_2) sensor in the vehicle exhaust

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